He has significant experience in successfully completing complex merger transactions, having represented Yahoo!, Inc. in its joint venture with Microsoft, Inc., Avis in its acquisition of Budget, Genzyme in its acquisition of Ilex Oncology, Centennial Communications in its acquisition by AT&T, and Rural Cellular in its acquisition by Verizon Wireless.

In his litigation work, Mr. Weiner has represented clients in price-fixing and other antitrust class actions in a variety of industries, including insurance (AXIS Specialty Insurance Company and AXIS Surplus Insurance Company), real estate brokerage (Realogy Corp.), art auctions (Christie’s, Inc.) and magnesite (China Minmetals Corporation and China National Minerals Co., Ltd). He represented Travelport Inc. in a high-profile, bet-the-company monopolization and antitrust conspiracy lawsuit with American Airlines.

Mr. Weiner has been recognized for his work by legal referral guide Chambers USA, where he was “praised by commentators who note that ‘he is extremely knowledgeable on substantive antitrust law, and better yet, he’s easy to work with.’” Chambers USA also wrote that Mr. Weiner has won “particular acclaim” for his “M&A expertise” and is also noted for providing “thoughtful guidance” by commenters who consider him “extremely knowledgeable” and “extremely practical.” He has been named a national and New York “litigation star” in Benchmark Litigation, “recommended” in Legal 500, and listed in Chambers Global, Who’s Who Legal, International Who’s Who of Competition Lawyers and Global Counsel Handbooks’ Competition Law as well as in The Best Lawyers in America. He was also featured (a number of years ago) in Global Competition Review’s “45 Under 45 Survey of International Competition Lawyers.”

He is a frequent speaker and author on a wide range of antitrust/competition issues and currently serves as an officer of the New York State Bar Association's Antitrust Section. He sits on the editorial board of World Competition Law and Economics Review and is the former editorial chair of ANTITRUST magazine (1994-1998), as well as a former Council Member and Officer of the ABA’s Antitrust Section.

Law360 Competition Editorial Advisory Board Member
New York State Bar Association Antitrust Section Vice-Chair and Executive Committee member
ABA Antitrust Section former Secretary and Chief Communications Officer and Council Member
Former Antitrust Magazine Editor-in-Chief